When you go to Administration > Table settings > OPAC, currently there are 4 tables that can be configured: course-items-table, course_reserves_table, holdingst, subscriptionst. They are all four under the 'Page: biblio-detail' heading. However that is not true. course-items-table and course_reserves_table and not on the biblio-detail page, but rather on opac-course-details and opac-course-reserves respectively.
Still valid in 22.05.